Balancing-machine for rotatable bodies.



0. H. NORTGN.' BALANOING Mmmm: ron Mmmm: Bouma;

982,629. Arrmonxon rmsn Aue. ao, nop. Patented Jan 24, 1911.

2 SHEETS-SHEET 1.

l, I $4@ l I o. H. NORTON. BALANOINGl KLOHINE POB. BOTATABLB BODIES.

982, AI'PE'IGATIGE FILED AUG. 30. 1909. Patented Jan 24 2 SHEETS-SHEET 2.

putting crank shafts, wheels and all other ,the above .mentioned object. the invention UNITED STATES PATENT oEEIoE.

CHARLES i1. NORTON, OF wORoEsTEii, MASSACHUSETTS, A's'sIlGNOnTO NORTON GRINDING COMPANY, A CORPORATION OF- MASSACHUSETTS.

BALANoNG-MAC'HINE FOR ROTATABLE BODIES.

'Specification of Letters Patent.

Patented Jan. 24, 11911.

Application iled AAugust 30, `1909. Serial No. 515,137.

rotatable bodies int-o a condition of running balance. Heretofore, it has generally been customary to .balance up said bodies so as to be in balancel statically, but this does not insure aperfect balance when running because. two points of excess weight for example, might occur at opposite sides and "opposite ends, in which case the body would be in static balance but not in running balance.

The principal object of this invention is to provide practical and elicient meansfor putting rotatable bodies into perfect running balance. For the purpose of accomplishing involves means whereby the body to be balanced. can be caused to rotate while supported by a vibrating support and means for indicating the place at which the body is out of balance in a most rapid and accurate manner, and means whereby when the body has been brought into a perfect running balance, that fact will be indicated in an unmistakable way.

Further objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings in which,

Figure 1 is a front elevation of a machine constructed in accordance with this invention. Fig. I2 is an end elevation thereof. Fig. 3 is an enlarged viewof a portion of the end elevation.. Fig. 4 is a front view of the same. Fig. 5 is a plan of a portion of the same. Fig() is a sectional view of a detail thereof, and Fig.47 is a diagrammatic view indicating the result of the use of the machine.

The machine is illustrated as comprising a substantially rigid frame consisting of end uprlghts or legs 10 and a body 11. On one of the legs 10is shown a motor 12 for operatling the machine. Oven the pulley 13 of this -motor pass straight and crossed beltsll and 15 and supported b "the frame is a main shaft 16 having a tight -pnlle i 17 `and two loose pulleys 1'8. A belt shi' ter 19 is em ployed which can be used in an obvious lrna'nner to move both belts simultaneously soas to bring either one of them on the `tight i pulley or both of them on the'loose pulleys.

In this way `it will be seen that the main shaft 16 can be rotated in either direction without stopping the motor or interfering with any other elements which may be in place on-the machine.

Rigidly mountedon the body 11 of the frame are shown a pair of upright. supports 20. Each of these supports carries an adjustable lever 21 pivoted on the support and having a cup bearing 22 at one end "opening upwardly. Each lever is also provided with a screw 23 and a hand nut 24 bearing on a convex surface 25 of the support by which the lever can be adjusted and the height. of the bearing 22 regulated. Supported in said bearing 22 is a vertical vibrator 2G which extends upwardly through an enlarged passage 27 in the support. Surrounding this vibrator near the upper end is a bearing 2S having inwardly convex surfaces for engaging thevibrator. This bearing has a flange or plate 29 extending from it and supported by a rubber cushion 30 which is carried in 'a recess in the support 20. 0n account of this construction, it will be obvious that the vibrator is free to vibrate at its upper end. within certain limits while its lower end rotates in the bearing 22 and is prevented from vibrating.

Mounted on each vibrator vare two bearings 31 which carry shafts 32 on each of which are two anti-friction rollers. The hody A which is to be balanced is plaeed so as to rest on the several rollers 33 of the two vibrators-and it is rotated byA means of a pulley 35 on the main shaft [(5 and a belt 3G which conveniently may be made of ruhber or4 other elastic. material so as to he capable of yielding slightly upon adjustment of the parts.

' Projecting from the upper part of the vibrator is a bracket 4U which extends hetween the support 2() and a guard 41 mounted on the support. This guard prevents all tendencyon the partvof the vibrator itself to turn. Pivotally mountedr-on eachV sup` port is an indicator having a short arm 42 engaging the bracket 40 and a longindicating pointer 43, the 'arm and pointerbeing rigidly connected witheach other. A spring .44 isshown for an obvious purpose.

It will be seenlthat the vibration of the upper end of the vibrator will be transmitted to the indicator aid multiplied very materially so that the least vibration of the body A will be indicated by the oscillation of the pointer 43.- It will be obvious also .that when this pointer remains stationary during the rotation of the body A it will indicate that that end of the body is in running balance and when both pointers are statlonary, it will 'show that the e'ntire body is in that condition.

It is obvious. that the mereindication of\ the fact that the body is out of balance will be of small value unless some means is ro vided for .showing what part of the bo y lis too heavy or too light and for that purpose the following mechanism is provided.

Extending from each support 20 is apro` jection 50 having a longitudinal slot `51 therethrough. .Extending through this slot is a member consisting of three parts;"a' head 52, av body 53 and a reduced mdf-T54. The body 58 is located in the slot, the head above it, and the end 54 below it. This end is externall` screw-threaded and anhand nut 55 is provi ed' so that when this member vhas been adjusted to the proper position i along the slot '51,.-.the nut canbe tightened and the parts securely held in adjusted posi# tion. This member 1s provided with a longitudinal passage therethrough in which fits a pencil chuckstud 550. On'the head 52' is mounted a 4hand screw 56 for binding on the stud to hold itin its vertically ad-` having a screwl 59; for securing it in adjusted position. It will be obvious that the proy jection 5T of the, `stud can be turned end justed v positions. This stud is provided with a horizontal projection 57 along which is adapted to move a pencil chuck holder 58 'for end by turning the stud 180 degrees, so

that there is a wide vra/nge of. adjustment.y Mounted on the chuck holder `is a chucki 60 for holding a pencil 61 or `other markeri,

. position to engage the body A-.which isi-:to be balanced. v

.Reference to 7 will show how the vmarker is employed. v When the body A is out of balance, itv;is obviousV that the vibration caused whengthe body is rotating willV result 'in-causing the light side of tlie'body Vto beprojected vtoward the marker so that the'rejwill` be va mark as `for instance, a on A the Then When,. the rotation of the body sreversed by means of the belt shifter I9. another mark as a2 will appear on the body. .The 'heavy spot on the body which is being balanced will be found at a3 directly opposite4 a point half-way between the extremities of these two lines af and a2.

lIt will be understood, of course, that each end of thegrotating body is balanced in thev for balancing any particular class of arti- Y cles, but

'What I do claim is y 1. In a machine for balancing rotatable bodies, the combination of a frame,a motor supported thereby, a horizontal shaft carried by the frame independently of the motor, means for rotating. the shaft from the motor, aireversing means 'on the frame for reversing the direction of rotation of the .shaft without reversing the motor, a vertical vibratory support movably mounted on the frame for the body to be rotated, and an lendless connection extending froni the shaft to the body' for rotating said body.

2. In a device of the character described, the combination oa frame, a pair of suprts mounted thereon, each having avbearmg,- a vibrator resting at its lower end in each of said bearings, said su ports having means for yieldingly `holding t e upper ends of said iivibrators 'to them to vibrate, means on the vibrators for supportin the body to be balanced, and means on the rame .for rotating the body when supported by the Vibrators. v l i 3. In a device of the character described, the combination of a frame, a pair of suports mounted thereon, each having a bearlng, a vibrator comprising an upright memyber resting at its lower end in each of said lbearings, said supportsrhaving means for yieldingly holding the -u\pper ends-of said vibrators to permit them to vibrate, means on the vibrators for supporting. the opposite ends of the body to be balanced, and means on the frame for rotating the body when supportedr by the vibrators.

4. In a device ofthe class described, the combination of a frame, a pair of supports thereon, a levery ivotally mounted on each supportk and having a cup bearing thereon,

means for adjusting the position of said levers about their p1vots,a vertical vibra-tor resting at itslower end in each of said cup bearings, said supports having, a passage therethrough for -eachof the vibrators and a yielding bearing in said passage for permitting the vibrators to vibrate at their upper ends, means carried by the vibrators for supporting the body to be balanced, and means for rotating said body.

5. In a device for balancing rotatable bod# ies, the combination of a vibrator, means for supporting the lower end thereof, a bearing for the upperend of the vibrator, means for supporting said bearing, and a yielding cushion surrounding said bearing to permit a vibratory motion of the vibrator, and means on said vibrator for supporting the body to be balanced in position to rotate on a transverse axis.

,6. In a d evice for balancing rotatable bodies, the combination of ,a vibrator, a bearing therefor. having a plate or flange extending' outwardly at one end thereof, a rubber cushion on which said flal/ige rests, a frame having an enlarged opening for the vibrator and bearing and provided with a seat for said rubber cushion, -means for supporting the body to be balanced on a vibrator, and means independent of the vibrator for rotating said body onan axis transverse to that of the vibrator.

7. In a device for balancing rotatable bodies, the combination of a cup bearing, a vibrator resting at its lower end in said bearing and projecting upwardly therefrom, means on the vibrator for supporting the body to be balanced, and means inde endent of the vibrator for'rotating said body on a horizontalv axis.

' 8. In a device for balancing rotatable bodies, the combination of a vibrator, means for supporting one end thereof, a bearing for the opposite end having an internal convex bearing su face, means for supporting said bearing, a d a rubber cushion on which said supporti/hg means rests, said vibrator havin means forcarrying said body to be balanc 9. In a device for balancing rotatable bodiesrthe combination of a vibrator, means `for supporting one end thereof, and albearing for the opposite end having an internall convex bearing surface,.said vibrator havin means for carrying said body to be balance t 10. In a machine for balancing rotatable.

bodies, the combination of a vibrator adaptetl to su port the body to be balanced, a

yielding earing for one end of the vibrator,

`and an adjustable bearin for the other end.

11; In a machine for a 1ancin rotatable bodies, the combination of a vibrgt ed to su port the body to be balanced, a yielding earing for one end of the vibrator,

' an unyielding. bearing for the` other end 60' and means for adjusting the unyieldin'g bearing toward and from the yielding bearing.

12. In a device for` balancing rotatable bodies, the combination of a vibrator, a support for the lower end thereof, means for or adaptyleldingly supporting the upper end of the vibrator, means on the vibrator for rotatably 4supporting the body to be balanced, and

means for preventing the vibrator from turning on its axis.

13. In a machine for balancing rotatable bodies, the combination of a vibrator adapted to support the body to be balanced, a yielding bearing for one end of the vibrator, a bearing for the other end, a bracket rigidly mounted on said vibrator, and a guard for said bracket for preventing 'the vibrator from turning and means for adjusting the unyielding bearing.

14. In a device for balancing rotatable bodies, the combination of a vertical vibrator, means for yieldingly supporting the upper end of the vibrator, means on the vibrator for rotatably supporting the body to be balanced, means for preventing the vibrator from turning on its axis, and an indicator in position to be operated by the vibrator and having a long pointer.

15. In a device for balancing rotatable bodies, the combination of a vibrator, a yielding bearing for one end thereof, means on the vibrator for supporting the body to be balanced, a bracket projecting' from the vibrator, means .engaging said bracket for preventing the vibrator from turning, and an indicator in position to be operated b the bracket for showing the vibration o the vibrator.

16. In a device for balancing rotatable bodies, the combination of a vibrator, means on the vibrator for supporting the bod to be balanced, means for rotating the bo y, a pivoted indicator having a short arm adapted to be engaged by the vibrator and provided with a long pointer rigid with the arm for indicating the vibration of the vibrator.

17. In a machine for balancing rotatable bodies, the combination of a vibrator, a yielding bearing for one end thereof, means on the vibrator for rotatably supporting the body to be balanced, a pointer in 'osition to be moved by the vibrator for indicating the vibration thereof, and .an adjustable marker located adjacent to the vibrator in position to engage the body supported thereby.

18. In a device for balancing rotatable bodies, the combination of a frame, a vibrator carried by the frame, means-on the vibrator for carrying the body to be balanced, said frame having aprojection thereon provided with a slot, a stud extending through said slot, means for securing the stud in adjusted positions on the slot, said stud being vertically movable, mean's for securing the stud in vertically adjustable (positions, and

a.. marker adjustabl mounte on the stud for marking the bo y to be balanced.

19. In a device for balancing rotatable bodies, the combination of a frame, a vibrator, means on the vibrator for carrying vthe Intestmony whereof I have hereunto set body to be balanced, said frame having a my hand, in the presence of two subscribing slot, a stud extending through said slot, Witnesses. means for securing the stud in adjusted po- CHARLES H. NORTON. Stons in the slot, and amarker adjustably Witnesses:

mounted on the stud for marking the body g C. O. SMITH,

to be bala-need; ALBERT TURNER. 

